<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/Welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item :to="{path:'/goods'}">商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片 -->
    <el-card>
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <el-steps align-center :space="200" :active="+ activeIndex" finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab区域 -->
      <el-form
        label-position="top"
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
      >
        <el-tabs
          @tab-click="tabClicked"
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input type="number" v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input type="number" v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input type="number" v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                :options="catelist"
                :props="cateProps"
                v-model="addForm.goods_cat"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单Item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action请求的上传地址 
            onpreview 处理预览时事件-->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handelSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品按钮 -->
            <el-button type="primary" @click="add" class="btnAdd">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img src="../../assets/pikaqiu.jpg" class="previewImg" />
    </el-dialog>
  </div>
</template>
<script>
import _ from "lodash";
export default {
  data() {
    return {
      activeIndex: "0",
      //   添加商品表单数据
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属分类
        goods_cat: [],
        // 图片的数组
        pics: [],
        //商品详情描述
        goods_introduce: "",
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" }
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" }
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" }
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" }
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" }
        ]
      },
      //   商品分类数据
      catelist: [],
      cateProps: {
        expandTrigger: "hover",
        label: "cat_name",
        value: "cat_id",
        children: "children"
      },
      //   动态参数列表数据
      manyTableData: [],
      //   静态属性参数
      onlyTableData: [],
      // 上传图片地址
      uploadURL: "https://www.liulongbin.top:8888/api/private/v1/upload",
      // 图片上传组件的头
      headerObj: {
        Authorization: window.sessionStorage.getItem("token")
      },
      previewPath: "",
      previewVisible: false
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    //   获取商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200)
        return this.$message.error("获取商品分类数据失败");
      this.catelist = res.data;
      this.$message.success("获取商品分类数据成功");
    },
    // 级联变化触发
    handleChange() {
      console.log(this.addForm.goods_cat);
      if (this.addForm.goods_cat.length !== 3) this.addForm.goods_cat = [];
    },
    // 跳转之前的操作
    beforeTabLeave(activeName, oldActiveName) {
      //   console.log("即将离开的标签页名字是：" + oldActiveName);
      //   console.log("即将到的标签页名字是：" + activeName);
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.closeAll();
        this.$message.error("请先选择商品分类");
        return false;
      }
    },
    async tabClicked() {
      // 访问的是动态参数面板
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "many" }
          }
        );
        if (res.meta.status !== 200)
          return this.$message.error("获取动态参数列表失败");
        this.$message.success("获取动态参数列表成功");
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyTableData = res.data;
      } else if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "only" }
          }
        );
        if (res.meta.status !== 200)
          return this.$message.error("获取静态属性列表失败");
        this.$message.success("获取静态属性列表成功");
        this.onlyTableData = res.data;
      }
    },
    // 处理预览
    handlePreview(file) {
      this.previewPath = file.response.data.url;
      this.previewVisible = true;
    },
    // 处理移除
    handleRemove(file) {
      const filePath = file.response.data.tmp_path;
      const i = this.addForm.pics.findIndex(x => x.pic === filePath);
      this.addForm.pics.splice(i, 1);
      console.log(this.addForm.pics);
    },
    // 监听图片上传成功
    handelSuccess(response) {
      // 1.拼接得到一个图片信息
      const picInfo = { pic: response.data.tmp_path };
      // 2.push
      this.addForm.pics.push(picInfo);
      console.log(this.addForm.pics);
    },
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error("请填写必填项");
        // 执行添加
        // this.addForm.goods_cat = JSON.parse(
        //   JSON.stringify(this.addForm.goods_cat)
        // );
        const form = JSON.parse(JSON.stringify(this.addForm));
        form.goods_cat = form.goods_cat.join(",");
        //处理动态参数静态属性
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(" ")
          };
          this.addForm.attrs.push(newInfo);
        });

        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          };
          this.addForm.attrs.push(newInfo);
        });
        form.attrs = this.addForm.attrs;

        // 商品名称必须唯一
        const {data:res} = await this.$http.post('goods',form)
        if(res.meta.status!==201) return this.$message.error('添加商品失败')
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      });
    }
  },
  computed: {
    cateId() {
      return this.addForm.goods_cat.length === 3
        ? this.addForm.goods_cat[2]
        : null;
    }
  }
};
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: auto;
}
.btnAdd {
  margin-top: 15px;
}
</style>